Question

seth is making a slideshow about precious metals for a school project. he learns that gold (au), silver (ag), and copper (cu) are often used in jewelry and coins. seth also learns that they are all transition metals. he wants to explain the properties of these metals to his classmates. which statement should seth exclude in his slideshow?
a these metals have very low melting points
b gold, silver, and copper are highly reactive
c these metals resist heat and are less reactive than group 1 and 2 metals
d gold, silver, and copper have very different physical and chemical properties.

Explanation:

Gold, silver, and copper are transition metals with relatively high melting - points, are less reactive than group 1 and 2 metals, and have some similar physical and chemical properties due to being in the same block of the periodic table. Option A is incorrect as they don't have low melting points. Option B is incorrect as they are not highly reactive. Option D is incorrect as they have some similarities. Option C is correct as these metals resist heat and are less reactive than group 1 and 2 metals.

Answer:

C. These metals resist heat and are less reactive than group 1 and 2 metals